1)Do some research (ask me for a book or research internet or check my website 11^th grade)

on the universal law of gravity. (or law of universal gravitation) . The law says that :

 

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The formula for the force of gravity between 2 masses m1 and m2 and  separated by a distance r is :

F =                                       where G is the gravitational constant. (G = ____________ ).

The force of gravity between 2 masses (like 2 stars)  is proportional to the __________ of each star  but  inversely proportional
 to the _____________ squared between the stars. So if the mass of one of the start is multiplied by 2, the force is multiplied by ___________ but
if the distance between the 2 stars  is multiplied by 2, the force is divided by ______________.
The greater the mass the ____________ the force of gravity, the greater the distance the ___________ the force of gravity.

2) Why Mountains can't be too high on EArth?

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3) How high is the Mount Everst in miles ?. (internet)

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4) exploding stars are called _______________________.

5) Why Mars does not have water as we do ?

 (what is it that keep the water vapor to escape to space)

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6) In the Universe, what’s the job of the force of gravity ? (1^st fundamental force)



7) The mass of the Earth is in the trillion trillion kg range. write this number in scientific notation..............................................................................................................................................
8) Which part of our body helps us keeping our balance ? (the system is the v___________ system)

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9) where are located the crystals that prevent us from falling backward or forward.

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10) when you walk you are constantly ____________



11) If would take 2 years before getting to MArs. Describe our body when we will get there.

12) How the body is expected to change as people live and reproduce in space, without the effect of gravity

13) One of the moon of Jupiter is IO. (jupiter is a massive planet and exert a huge force on its moon). Explain why IO hosts                                                                many active volcanoes. 

14) Where does the ring of saturn comes from ?